지역거주 노인의 BMI와 활동체력과의 관계

성순창(Soon-Chang, Sung),김현수(Hyun-Soo, Kim) 한국생활환경학회 2014 한국생활환경학회지 Vol.21 No.2

The purpose of this study was to assess the association between functional fitness (FF) and levels of body mass index (BMI) in community-dwelling older people. Independently-living older adults (482 men and 1092 women), aged 65-80 years, were recruited from four community senior wellbeing-center. Subjects were group into four categories of BMI (under weight; UW, normal weight; NW, over weight; OW, obese; OB) using Asian criteria, and betweengroup differences in FF were analyzed by using ANCOVA adjusting for age. Functional fitness was evaluated by using the following measurements: sit and reach, timed up and go, arm curl, functional reach, and chair sit to stand. There were sex differences among BMI groups. Although there was not significant, compared to those that were NW or OW, individuals with UW or OB scored lower on the sit and reach, chair sit to stand, and 2-min walk. These results suggest that lower and/or higher BMI are related to selected physical fitness parameters among older adults, and may affect the ability perform activity of daily living. In conclusion, underweight or/and obese older people were associated with a greater likelihood of poor functional fitness.

PNF 탄력밴드 운동과 Bobath 개념의 운동이 뇌졸중으로 인한 편마비 환자의 보행과 자세안정성에 미치는 영향

성순창(Sung, Soon-Chang),오동건(Oh, Dong-Gun),이만균(Lee, Man-Gyoon) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.6

This study was designed to examine the effects of elastic band exercise using proprioceptive neuromuscular facilitation (PNF) and central nervous system (CNS) exercise developed based on Bobath concept on gait and postural stability in hemiplegic stroke patients. Fourteen patients were divided into two groups, i.e., elastic band exercise using PNF group (PNF group; n=7) and CNS exercise developed based on Bobath concept group (Bobath group; n=7). Subjects in PNF group and Bobath group performed elastic band exercise using PNF and CNS exercise using Bobath concept, respectively, for 30 min/session and five sessions/wk for four weeks. Gait and postural stability were measured and compared between two groups and between pre- and post-test. Main results of the present study were as follows: 1) Step time, gait cycle, double support time, mean normalized velocity, and cadence improved significantly in Bobath group, but they did not change significantly in PNF group. 2) Stride length improved significantly in PNF group, whereas step length, stride length, and F AP improved significantly in Bobath group. 3) No significant changes were found in sum of deviation X, Y, and total in both groups. It was concluded that CNS exercise using Bobath concept would be more beneficial to improve temporal parameters and spatial parameters than elastic band exercise using PNF. Therefore, CNS exercise using Bobath concept could be very effective alternative method to treat hemiplegic stroke patients.

탄력저항성 운동과 평형성 운동 트레이닝이 여성 노인의 등속성 근기능, 균형 능력 및 균형 자신감에 미치는 영향

성순창 ( Soon Chang Sung ),이만균 ( Man Gyoon Lee ) 한국스포츠정책과학원(구 한국스포츠개발원) 2007 체육과학연구 Vol.18 No.4

본 연구의 목적은 12주간의 탄력저항성 운동과 평형성 운동 트레이닝이 여성 노인의 등속성 근기능, 균형 능력 및 균형 자신감에 미치는 영향을 규명하는 것이었다. 탄력저항성 운동 집단(17명)의 피검자는 한 회에 60분씩, 일주일에 3회 밴드를 이용하여 저항성 운동을 실시하였고, 평형성 운동 집단(17명)의 피검자는 정적, 동적, 그리고 시각을 자극하는 평형성 운동을 탄력저항성 운동 집단과 동일한 시간과 빈도에 따라 실시하였으며, 통제 집단(18명)의 피검자는 같은 기간 동안 평소의 생활을 그대로 유지하였다. 노인의 건강을 위협하는 낙상의 주원인으로 알려진 하지 근력과 평형성을 평가하기 위하여 선정한 하지의 등속성 근기능, 균형 능력 및 균형 자신감을 12주간의 처치 전, 후에 모든 피검자를 대상으로 측정하였으며, 반복이 있는 이원변량분석을 이용하여 분석하였다. 12주간의 처치에 따라 발목의 배측굴곡(180°/sec)에서 검사의 주효과와 집단과 검사의 상호작용이 유의하게 나타났다. 12주간의 처치에 따라 무릎의 등속성 근기능에서 검사의 주효과가 유의하게 나타났다. 탄력저항성 운동 집단의 경우 모든 등속성 근기능 관련 변인에서 유의한 증가가 나타났다. 평형성 운동 집단의 경우 굴근과 신근의 최대 힘효율(90°/sec), 굴근의 체중당 최대 힘효율(90°/sec)에서 통계적으로 유의하게 증가된 것으로 나타났다. 균형 능력과 관련된 변인은 탄력저항성 운동 집단에서 증가된 경향을 보였으나, 통계적으로 유의한 차이는 나타나지 않았다. 반면에 평형성 운동 집단에서는 균형 능력과 관련된 모든 변인들이 통계적으로 유의하게 증가된 것으로 나타났다. 균형 자신감 점수는 두 집단 모두에서 통계적으로 유의하게 증가된 것으로 나타났으나, 평형성 운동 집단의 증가 폭이 더 큰 것으로 나타났다. 이상의 연구 결과를 토대로 하여, 탄력저항성 운동과 평형성 운동은 모두 낙상의 주원인으로 알려진 하지의 근기능과 균형 능력의 향상에 도움이 되는 것으로 밝혀졌다. 특히, 평형성 운동 트레이닝 프로그램은 탄력저항성 운동에 비하여 균형 능력을 더욱 크게 향상시킨 것은 물론 등속성 근기능과 균형자신감의 향상에도 매우 효과적인 것으로 나타나, 향후 낙상의 예방을 위한 운동 프로그램을 작성할 때는 평형성 운동을 적극적으로 포함시켜야 할 것으로 판단된다. The study was designed to examine the effects of 12 weeks of resistance and balance exercise training on isokinetic function of lower extremities, postural stability, and balance efficacy in elderly women. Fifty-two healthy elderly women were volunteered to participated in the study as subjects and were assigned to one of three groups, i.e., resistance exercise training group(RETG: n=17), balance exercise training group(BETG: n=17), and control group(CG: n=18). The subjects in RETG participated in resistance exercise training program which was consisted of thera-band exercise, 60 minutes per session, and three times per week. The subjects in BETG went through the balance exercise training program for same duration and frequency as RETG. The variables regarding to isokinetic function, postural stability, and balance efficacy were measured before and after each intervention in three group. The data were analyzed utilizing two-way ANOVA with repeated measures. The results were as follows: 1) There was a significant main effect of test and interaction between group and test in dorsi flexion(180˚/sec) of ankle after 12 weeks of interventions. There was a significant main effect of test in isokinetic function of knee after 12 weeks of interventions. All variables regarding to isokinetic function in RETG increased significantly after 12 weeks of resistance exercise training. Peak torque of flexion and extension(90˚/sec), peak torque per body weight of flexion(90˚/sec) in BETG increased significantly after 12 weeks of balance exercise training. 2) The variables related to postural stability in RETG showed a tendency to be improved, but the changes failed to reach statistical significant level. These variables in BETG increased significantly after 12 weeks of balance exercise training. 3) The scores in balance efficacy increased significantly in both training groups due to the exercise training(P<.01). It was concluded that both resistance and balance exercise training programs were effective in enhancing the falling injury-related variables such as isokinetic strength, postural stability, and balance efficacy. Especially, it was shown that balance exercise training was more effective in enhancing the variables compared to resistance exercise training, indicating that the exercise training program for preventing the falling injury in the elderly should be composed mainly of balance exercises.

스포츠기능성보조제에 대한 남자 대학 운동선수의 자각적 효과 분석

성순창(Sung, Soon-Chang),김승환(Kim, Seung-Hwan),정원상(Jung, Won-Sang),이만균(Lee, Man-Gyoon) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.6

The purpose of this study was to analyze top five most frequent types of the sports functional supplement(SFS), information provider of SFS, reason(s) to intake SFS, perceptive effects of SFS, reliability of SFS, and impotance of SFS in two hundreds fifty two male collegiate athletes. Main results obtained by multiple response analysis and Wilcoxon signed rank test were as follows: 1) Top five most frequent types of SFS were red ginseng, multivitamins, protein supplement, creatine, and vitamin+mineral. 2) Information providers were parents and family members for ginseng, multivitamins, and vitamin+mineral, whereas information providers were team colleagues and friends for protein supplement and creatine. 3) The purposes and perceptive effects of the top five SFS were different and various. 4) There was a significant difference between reliability and impotance in ginseng and vitamin+mineral. It was concluded that male collegiate athletes did not obtain the information on SFS in a professional way, although many male collegiate athletes were taking various types of SFS. The purposes and perceptive effects of SFS were different, and reliability and impotance of SFS were also different.

노인의 하지근력 평가방법으로서 의자 앉았다 일어서기의 타당성 검토 및 평가기준 제안

성순창(Sung Soon Chang),신소희(Shin So Hee),최규정(Choi Kyu jeong),김현수(Kim Hyun-Soo) 한국생활환경학회 2015 한국생활환경학회지 Vol.22 No.1

A major factor governing independence for the elderly and persons with disabilities is the ability to stand from a chair. The purpose of this study was to compare the validity of a 30 second chair sit-to-stand (CSS-30) and 5 times chair sit-to-stand (5-CSS) tests to evaluate the lower extremity muscle strength, and to develop normative CSS-30 standards for the Korean older adults (1947 men and 3046 women, aged 65-97 years), and to analyze age and gender patterns of decline for the CSS-30. The moderate high correlation between chair stand performance and maximum voluntary isometric contraction force of knee extension for both CSS-30 and 5-CSS (r=.455 and .414, respectively) supported the criterion-related validity of the chair stand as a measure of lower body strength (all, p<.01). As expected, chair-stand performance decreased significantly across age groups in decades―from the 60s to the 70s tothe 80s (p<.01), but no differences were observed between the gender groups. Active participants scored better in CSS-30 tests than their average and nonactive peers (p<.0001). This study showed that the CSS-30 tests provide a valid indicator of lower body strength of Korean elderly men and women in a field setting, and these newly established normative standards make it possible to assess individual lower body strength.

남녀 노인의 6분 걷기 검사와 강도별 신체활동량 수준과의 관련성

성순창(Sung, Soon-Chang),정진욱(Chung, Jin-Wook),정승삼(Jung, Seung-Sam),김현수(Kim, Hyun-Soo) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.5

The cardiovascular and musculoskeletal systems have received most attention as they are involved with most basic functions of everyday life. Maximal aerobic performance is reduced with age. The 6 minute walk test (6 MWT) is an useful assessment instrument for the exercise capacity of elderly. The impact of the physical activity status on the 6MWT-distance, however, remains unclear in the Korean elderly. The purpose of this study was to investigate whether the magnitude of regular exercise/physical activity is related to 6 MWT distance and to suggest a new evaluation standard for exercise capacity in older adults. Elderly people (206 men, 265 women) in a local community performed an IPAQ-7 questionnaire for the assessment of physical activity and participated in 6 MWT. The distance in 6 MWT was significantly reduced with advancing age in both men and women, consistent with a marked decrease in physical activity over aging. In contrast, physically active elderly individuals (more than 150 −300 min/week) showed a considerably longer distance in 6 MWT than that of less active individuals (less than 150 min/week). In conclusion, it is suggested that older adults who participate in regular physical activity with moderate/vigorous intensity for 150−300 min/week show greater aerobic endurance capacity than that of less active older adults. The innovative standard established in the present study contributes to the assessment of cardio-respiratory fitness level and would be utilized for exercise prescription of elderly individuals.

한국성인의 제지방령지수와 체지방량지수의 분포

성순창 ( Soon Chang Sung ),김현수 ( Hyun Soo Kim ) 한국스포츠정책과학원(구 한국스포츠개발원) 2012 체육과학연구 Vol.23 No.4

체지방량지수와 제지방량지수는 신장이 다른 피검자의 신체구성 성분의 비교를 가능하게 한다. 이 연구의 목적은 한국성인의 제지방량지수와 체지방량지수의 참조값을 설정하고 20세와 94세 사이의 연령대별 백분위 분포곡선을 개발하는 것이다. 피검자 5777명(남: 2509명, 여: 3268명)의 체지방량과 제지방량은 이중에너지 X-선 흡수법(DEXA)을 사용하여 구하였다. 제지방량지수 및 지방량지수는 제지방량 및 체지방량을 각각 신장2으로 나누어 구하였다. 연령대별 및 성별 자료의 백분위 25∼75의 범위내로 정의한 정상 제지방량지수 및 지방량지수는 모든 연령대별에서 비슷하였다. 즉 제지방량지수는 남자가 16.8~19.3kg/m2, 여자가 14.9~16.1kg/m2이었다. 20대와 60대의 체지방률의 참조값은 각각 남자가 23.1~34.7%, 22.7~34.7%이었고, 여자는 23.9~33.4%, 23.5~35.2%였다. 결론적으로 백분위로 나타낸 자료는 성과 연령이 같은 건강한 성인의 신체구성 비교에서 참조로 사용할 수 있으며, 이 신체구성 변인들의 범위는 건강 전문가들이 한국인을 대상으로 노화, 영양결핍, 그리고 만성질환으로 발생하는 신체구성 변동을 평가할 때 이용할 수 있다. S. C. Sung, & H. S. Kim Fat-free mass index and fat mass index percentiles in Korean adults. Exercise Science. 00(0): 000-000, 2012. Body fat mass index (FMI) and fat-free msss index (FFMI) permit comparisons of subjects with different heights. The aims of this study were to establish reference values for FFMI and FMI in an Korean adult population, and to develop percentile distribution curves for age brakets between 20 and 93 years. Body fat and fat-free mass were determined in healthy men (n=2509) and women (n=3268) by DEXA. Normal FFMI and FMI were defined within the range of the 25th to 75th percentile of age-and gender-specific data. The reference range for the FFMI was similar in all age groups, i.e 16.8~19.3 kg/m2 in men and 14.9~6.1 kg/m2 in men and 14.9~6.1 kg/m2 in women. No difference with age in males and a modest increase in females were, observed. The reference values for percentage of body fat in the two age brackets 20~69 were, observed. The reference values for percentage of body fat in the two age bracket 20~29 and 60~69 were, respectively, 23.1~34.7%, 22.7~34.7% for men and 23.9~3.4%, 23.5%~35>2% for women. The median FMI was 5.1 kg/m2 in males and 6.8 kg/m2 in females. In both genders, from young to elderly age categories, FMI progressively increased with age. FFMI and FMI have advantage of expressing both aspects of body composition in common units. In conclusion, BMI alone cannot provide information about the respective contribution of fat-free mass or fat mass to body weight. These body composition ranges can be used by clinicians and nutritionsts as reference values for a Korean when evaluating body composition variations occurring in aging. malnutrition and chronic diseases.

12주간의 저항성운동 트레이닝이 비만 남성의 기초대사량과 adipocytokine에 미치는 영향

이만균 ( Man Gyoon Lee ),성순창 ( Soon Chang Sung ),이신언 ( Shin Eon Lee ),정원상 ( Won Sang Jung ) 한국운동생리학회(구 한국운동과학회) 2011 운동과학 Vol.20 No.4

이만균, 성순창, 이신언, 정원상. 12주간의 저항성운동 트레이닝이 비만 남성의 기초대사량과 adipocytokine에 미치는 영향. 운동과학, 제20권 제4호, 405-416, 2011. 본 연구의 목적은 12주간의 저항성운동 트레이닝이 20대 비만 남성의 기초대사량과 adipocytokine에 미치는 영향을 규명하는 것이다. 연구 대상자는 체지방률 25% 이상의 남성 28명으로서, 이들을 저항성 트레이닝 집단(n=14)과 통제 집단(n=14)으로 구분하였다. 저항성 트레이닝 집단의 대상자는 12주간, 주당 3~4회, 회당 40~60분씩, 8 RM의 강도로 2~3 세트씩 저항성운동 트레이닝을 실시한 반면, 통제 집단의 대상자는 같은 기간 동안 평소 생활 습관을 유지하도록 하였다. 본 연구의 주요결과는 다음과 같다. 1) BMI와 체지방률에서 검사의 주효과가 유의하게 나타났으며, 두 집단 모두 체지방률의 유의한 감소가 나타났다. 2) 1-RM과 관련된 모든 변인은 저항성 트레이닝 집단에서만 유의하게 증가되었다. 3) RMR은 단위와 상관없이 모든 변인이 저항성 트레이닝 집단에서 유의하게 증가된 것으로 나타난 반면, 통제 집단의 경우 RMR(KJ·kg-1 FW·h-1)에서만 유의한 증가가 나타났다. 4) TT4와 norepinephrine에서 검사의 주효과가 유의하게 나타났다. 저항성 트레이닝 집단과 통제 집단 두 집단 모두의 경우 norepinephrine에서 유의한 감소가 나타났다. 5) Adiponectin과 IL-6에서 검사의 주효과가 유의하게 나타났으며, 두 집단 모두에서 adiponectin과 IL-6가 유의하게 감소된 것으로 나타났다. 12주간의 저항성운동 트레이닝은 안정 시 대사율을 증가시켜 장기적인 체중 관리에 효과적일 것으로 결론지을 수 있다. 또한 저항성운동이 안정 시 대사율을 증가시키는 기전을 밝히기 위하여 TT4, FFA, 그리고 norepinephrine 이외의 변인을 연구해 볼 필요가 있으며, 저항성운동이 adipocytokine에 미치는 영향을 보다 명확히 규명하기 위한 후속 연구가 요청된다. Lee, M. G., Sung, S. C., Lee, S. E., Jung, W. S. Effects of 12 weeks of resistance exercise training on resting metabolic rate (RMR), and adipocytokines in obese men of 20s. Exercise Science, 20(4): 405-416. 2011. Twenty-eight obese men, aged 23.7±1.18 yrs, were randomly assigned to one of two groups, i.e., resistance exercise training group (TR: n=14) and control group (CON: n=14). Participants in TR performed resistance exercise training 40~60 min/session, 3~4 sessions/week, for 12 weeks, whereas participants in CON were asked to maintain their normal life pattern during same intervention period. Resistance exercise included bench press, shoulder press, biceps curl, triceps extension, lat pull down, leg press, leg curl, leg extension, sit up, standing calf raise, and squat, and performed at 8 RM for 2~3 sets. Main results of the present study were as follows: 1) Percent body fat decreased significantly in TR (p<.01) and CON (p<0.05). 2) All variables regarding 1-RM increased significantly in TR. 3) RMR increased significantly in TR, regardless of unit expressing the RMR. 4) No significant changes were found in TT4 and FFA, whereas NOR decreased significantly in TR (p<.001) and CON (p<.01). 5) Adiponectin and IL-6 decreased significantly in TR (p<.01) and CON (p<.01), whereas no significant change was found in TNF-α. Leptin was unaltered in TR, but increased significantly in CON. It was concluded that 12 weeks of resistance exercise would be beneficial for long-term body weight management by enhancing metabolic rate in resting state. Research investigating the mechanism explaining the enhancement, besides to TT4, FFA, and NOR, would be needed. Investigation elucidating the effects of resistance exercise training on adipocytokines would be also warranted.

두 가지 유형의 복합운동 트레이닝이 농촌 노인의 일상생활체력에 미치는 영향

강창균 ( Chang Kyun Kang ),성순창 ( Soon Chang Sung ),이만균 ( Man Gyoon Lee ) 한국스포츠정책과학원(구 한국스포츠개발원) 2010 체육과학연구 Vol.21 No.2

이 연구의 목적은 두 가지 유형의 복합운동 트레이닝이 농촌 노인의 일상생활체력에 미치는 영향을 규명하는 것이었다. 농업에 종사하는 65세 이상의 남?여 노인 39명(저항성운동과 걷기 집단 13명, 에어로빅과 요가 집단 13명, 통제 집단 13명) 중 트레이닝 집단의 경우 12주간 주 3회, 일일 60분씩 해당된 운동을 실시하였다. 두 가지의 복합운동 트레이닝 프로그램은 농업인 체육활동 참여실태에서 조사된 선호종목과 실시 가능성을 종합적으로 고려하여 구성되었다. 이 연구에서 얻은 주요 결과는 다음과 같다. 첫째, 신체구성과 관련하여 두 가지 복합운동 집단에서 체지방량과 체지방률의 유의한 변화가 없었으나, 통제집단의 체지방량은 유의하게 증가된것으로 나타났다. 둘째, 일상생활체력과 관련하여 저항성운동과 걷기 집단의 경우 아령들기, 페그보드, 앉아윗몸앞으로굽히기, 발스테핑, 눈뜨고외발서기, tandem test, 그리고 10m 보행에서 트레이닝에 따라 유의한 향상이 나타났으며, 에어로빅과 요가 집단은 아령들기, 의자앉아일어서기, 페그보드, 앉아윗몸앞으로굽히기, 그리고 10m 보행에서 유의한 향상이 나타났다. 이상의 결과를 종합해 보면, 12주간의 저항성운동과 걷기의 병행 실시에 따라 상완 근지구력, 협응성, 유연성, 민첩성, 정적·동적 평형성, 그리고 보행능력이 향상되었으며, 에어로빅과 요가에 비하여 일상생활체력의 향상에 보다 효과적이었다고 결론지을 수 있다. 도시 노인에 비하여 체력과 건강수준이 떨어져 있고 도시에 비하여 체육활동 참여여건이 열악한 복지의 사각지대에 있는 농촌 노인의 건강 증진을 위하여 효과적인 운동 프로그램을 개발?제공하는 노력이 계속 경주되어야 할 것이다. This study was designed to investigate the effects of two kinds of combined exercise training for 12 weeks on daily living fitness in elderly farmers. Thirty-nine farmers, aged above 65 yrs, volunteered to participate in the study as subjects and were divided into one of three groups, i.e., the 1st combined exercise training group (resistance exercise and walking: n=13), the 2nd combined exercise training group (aerobic dance and yoga: n=13), and control group (n=13). Subjects in two combined training groups performed their assigned exercise one hr/day, three days/wk for 12 weeks. Data obtained at pre- and post-test were compared among three groups and between two tests utilizing two-way ANOVA with repeated measures. The results of the present study were as follows: 1) There was no significant change in fat mass and percent body fat in two combined exercise training groups, whereas fat mass increased significantly in control group. 2) Arm curl, manipulating pegs in a pegboard, sit-and-reach, foot stepping, one leg standing with eyes-open, tandem test, and 10m walking speed were improved significantly in the 1st combined exercise training group. Arm curl, chair stand, manipulating pegs in a pegboard, sit-and-reach, and 10m walking speed were improved significantly in the 2nd combined exercise training group. It was concluded that muscular endurance of upper arm, coordination, flexibility, agility, balance, and gait function were improved by combined exercise training of resistance exercise and walking and that the combined exercise training was more effective for enhancing daily living fitness in the elderly farmers than the combined exercise training of aerobics and yoga. A great deal of efforts should be made to develop an effective exercise program for elderly farmers, whose health and fitness level is lower than urban dwellers of same age.

12주간의 저항성운동 트레이닝이 비만 남성의 근력, 혈중지질, 인슐린 저항성 및 미토콘드리아 DNA 양에 미치는 영향

정원상 ( Won Sang Jung ),성순창 ( Soon Chang Sung ),이만균 ( Man Gyoon Lee ) 한국스포츠정책과학원(구 한국스포츠개발원) 2011 체육과학연구 Vol.22 No.3

이 연구의 목적은 12주간의 저항성운동 트레이닝이 20대 비만 남성의 근력, 혈중지질, 인슐린 저항성, 그리고 미토콘드리아 DNA(mtDNA) 양에 미치는 영향을 규명하는 것이었다. 이 연구의 대상자는 체지방률 25%이상의 20대 비만 남성 28명으로서, 이들을 트레이닝 집단(14명)과 통제 집단(14명)에 무선 할당하였다. 트레이닝 집단의 대상자는 12주간, 주3∼4회, 일일 총 60∼80분씩 저항성운동을 실시한 반면, 통제 집단의 대상자는 같은 처치 기간 동안 평소의 생활을 유지하도록 하였다. 처치 기간 중 3주에 한번씩 섭취한 음식을 분석하여 섭취하는 에너지양을 최대한 일정하게 유지하도록 지도하였다. 처치 전·후에 근력, 혈중지질, 인슐린 저항성, 그리고 mtDNA 양과 관련된 변인을 측정하여 집단 간, 그리고 검사 간에 비교하였다. 이 연구에서 얻은 주요 결과는 다음과 같다. 첫째, 신체구성은 트레이닝 집단과 통제 집단에서 체지방률과 체지방량이 유의하게 감소되었으며, 체중과 BMI는 유의한 변화가 나타나지 않았다. 둘째, 1-RM은 모든 변인이 트레이닝 집단에서만 유의하게 증가되었다. 셋째, 혈중지질은 유의한 변화가 나타나지 않았다. 넷째, 인슐린 저항성은 트레이닝 집단의 인슐린 농도만 유의하게 감소되었으며, HOMA-IR은 트레이닝 집단이 통제 집단보다 더 크게 감소되는 경향이 나타났다. 다섯째, mtDNA는 트레이닝 집단과 통제 집단에서 유의한 변화가 나타지 않았으나, 트레이닝 집단이 통제 집단 보다 더 증가되는 경향이 나타났다. 이상의 결과를 종합해 보면, 12주간의 저항성운동 트레이닝 프로그램이 비만 남성의 근력 향상과 인슐린 저항성 개선에 효과적인 운동 프로그램이라고 결론지을 수 있으며, mtDNA 양에서도 긍정적인 영향을 미칠 수 있는 가능성이 제시되었다. This study was designed to examine the effects of 12 weeks of resistance exercise training on muscular strength, blood lipid profiles, insulin resistance, and mitochondria DNA (mtDNA) contents of obese men in 20s. Twenty-eight obese men were randomly assigned to one of two groups, i.e. resistance exercise training group (TR: n=14) and control group (CON: n=14). Subjects in TR participated in resistance exercise training 60-80 min/session, 3-4 sessions/week, for 12 weeks, whereas subjects in CON were asked to maintain their normal life pattern for same intervention period. They were asked not to change their diet pattern and energy intake throughout the intervention period. The variables regarding body composition, muscular strength, blood lipid profiles, insulin resistance, and mtDNA contents were measured and compared between two groups as well as between pre- and post-test. Main results of the present study were as follows: 1) Percent body fat and fat mass decreased significantly in TR and CON, whereas body weight and BMI were not changed significantly. 2) All variables regarding 1-RM increased significantly in TR. 3) Blood lipids were not changed significantly. 4) Fasting insulin decreased significantly and HOMA-IR tended to decrease in TR. 5) MtDNA contents unaltered significantly; however, it increased more in TR than CON. It was concluded that 12 weeks of resistance exercise would be beneficial for improvement of muscular strength and enhancement of insulin resistance.